ASTERIX source code is kept in text libraries. Application code is kept in a collection of monolith libraries SPECLIB:, TIMLIB: etc. (type SHO LOG *LIB to list all the defined libraries), along with application-specific subroutines, whilst general ASTERIX subroutines are kept in a single ASTLIB library. Source code can be examined or extracted from these text libraries using the DOCLIB tool e.g. type DOCLIB ASTLIB: and then follow the prompts; * acts as a wildcard.
Interface files for applications are stored in parallel text libraries stored in the monolith directories (the ASTERIX directory structure is explained in PROG_009), e.g. SPECLIB_IFL.TLB. The interface file for a particular application can be extracted with LIB/TEXT/EXTRACT.
Some exemplary programs and interface files can be found in directory AST_EXAMPLE.